Both sides were determined to let their defence do the talking, made evident by the fact the game was almost 20 minutes old before the scoreboard attendant was called upon.

Strong lead-up work by Tyson Brown put the Gorillas on the attack and winger Jarryd Pepper crossed for a 4-0 lead. However, the score was soon levelled by Sharks fullback Ian Catania.

The Gorillas fought back to lead at half-time, a slick back-line movement enabling Blake Colgan to crash over for 8-4. After the break, Warilla extended their advantage when Chad Lisch finished off Dane Corran and Jesse Dee's classy work.

Shellharbour's Justin Rodrigues hit back to bring the score to 12-8.

The Sharks dominated possession in the closing stages, but couldn't equalise and Brown sealed the win for the Gorillas with a late four-pointer.

Halfback Jack Alexander gave the Knights something else to celebrate, propelling his side to a 30-28 win over Jamberoo at Kiama Showground on Saturday.

Trailing the Superoos 28-26 with less than a minute to play, it looked like Jamberoo would deflate Kiama's centenary celebrations until Alexander scooped up a loose ball and raced 80 metres to hand his side the win.

From the start it looked to be Kiama's day, early tries to Tom Atkins and Oliver Powell giving them a 16-0 lead.

Jamberoo's Chris Woods, Matt Coehlo and Josh Champion took the Superoos to an 18-16 buffer, before a penalty goal to Alexander levelled the scores at half-time. After the break the visitors seemingly sealed the game when Gavin Jarrett gave them a six-point lead, but Kiama's Travis Poole scored, before Alexander nabbed the match-winner.

At Noel Mulligan Oval, Gerringong crashed Port Kembla's centenary party with a 48-10 win. The Blacks' early 10-0 lead was clawed back by the Lions, and in the second half Gerringong ran in seven tries.